New Bus Rapid Transit (BRT) service will be coming to Pentagon City, Crystal City and Potomac Yard next year.

Metro is planning to launch a new bus line, the 9X line, to run in dedicated transit lanes between parts of south Arlington and Alexandria. The Alexandria portion — to run from the Braddock Road Metro station to Potomac Yard via Route 1 — is expected to open in spring 2014. The Arlington portion — from the Pentagon City Metro station to the Crystal City Metro station to Potomac Yard — is expected to open in summer or fall 2014, according to Arlington County Senior Transit Engineer Matthew Huston.

At first, the line will travel in mixed traffic on 15th Street Pentagon City and Crystal City. Eventually it will utilize the extended and contiguous 12th Street. The line will travel south in new dedicated bus lanes along S. Clark and S. Bell Street, and north along Crystal Drive.

The bus lanes will take the place of an existing, standard travel lane. They will be reserved for buses and emergency vehicles only during the morning and evening rush hours, but will be open to mixed traffic during all other times. Street parking will not be impacted by the changes.

As part of the still-evolving plan for what’s called the Crystal City-Potomac Yard Transitway, the existing 9S bus line will be extended to Potomac Yard and will run along the new dedicated lanes. The 9X and 9S will provide frequent service — every 6 minutes — and will serve a consolidated list of stops.

There will be seven new stops built in Arlington between Crystal City and Potomac Yard. Those stops will feature electronic information displays and other enhanced features. The buses will still serve on-street stops between the Crystal City and Pentagon City Metro stations.

The dedicated bus lanes will eventually be used as the right-of-way for the new Crystal City streetcar, though so far county officials aren’t providing a timeline for its eventual construction.

Planning, design and construction of Arlington’s portion of the transitway, which will also include the construction of new dedicated lanes between 26th Street and Glebe Road, is expected to cost the county about $17.5 million. Metro will pick up the tab for 13 new BRT-style buses, at a cost of about $650,000 apiece.

Metro is currently conducting an online survey about the design and branding of the buses. Possible names for the bus service include “Metro Beat” and “Metro Way.” It also asks about possible nicknames for the bus line, with options like: Crystal to Brad Line, Power House Corridor, City to the Yard Corridor, Potomac Yard Corridor, Tower Corridor, and Jeff Davis Corridor.

In an introduction, the survey emphasized that this would be Metro’s first BRT service.

Metro, in conjunction with Arlington County and the City of Alexandria will be introducing a new unique bus service to the region. Special stops and bus-only lanes will be introduced that will allow the bus to run on a very tight schedule. This corridor will be the first such service in the Washington region. Below is a map that shows the new route. The new service (sometimes called Bus Rapid Transit) will be different than anything the Washington region has seen before.